version: "3.7"
services:
  db:
    image: postgres
    environment:
      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
      - POSTGRES_USER=${POSTGRES_USER}
      - POSTGRES_DB=${POSTGRES_DB}
    volumes:
      - ./pgdata:/var/lib/postgresql/data
    ports:
      - "5432:5432"

tcp6       0      0 :::5432                 :::*                    LISTEN